有效雾化率
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The results show that the free-lead solder powder is best in the efficient atomization efficiency, size distribution and degree of sphericity with helium as the atomizing medium.
结果表明：在一定雾化条件下，氦气雾化粉末具有最高的有效雾化率、良好的粒度分布，且球形度最好；
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